bridge are $3 for passenger vehicles, $2.10 for commuters, and $4 per axle for commercial vehicles; currently the same toll rate is assessed in US dollars and Canadian dollars. Motorists have the option to pay with cash or an IQ Card, an electronic toll collection debit card that uses radio-frequency identification technology. History Indian trails to state highways Before Michigan became a state, the first land transportation corridors were the Indian trails. The French-Indian Trail ran through southeastern Michigan between Toledo, Monroe and Detroit. The Saginaw Trail ran north from Detroit to the Saginaw area where it connected with the original Mackinaw Trail that ran roughly parallel to, and west of, the modern I-75. Another path, the Cheboygan Trail, ran parallel to the modern freeway to the east between the West Branch area and Cheboygan. In the UP, an extension of the Mackinac Trail connected St. Ignace and Sault Ste. Marie. In the 19th century, the Michigan Legislature chartered private companies to build and operate plank roads or turnpikes in the state, many of which replaced the original Indian trails. These roads were originally made of oak planks, but later legislation permitted gravel as well. By the first decade of the 20th century, only 23 of the 202 chartered turnpikes were still in operation; many companies that received a charter never built their specified roadways. The remaining plank roads were turned over to the state or purchased by railway companies in the early part of the century. The State Trunkline Highway System was formed on May 13, 1913, and several sections of the system were designated along the course of the then-future I-75. Division 1 connected the Ohio state line northeasterly to Detroit, and Division 2 connected Detroit with Mackinaw City. A branch of Division 7 ran north from St. Ignace to Sault Ste. Marie. The system was signposted in 1919, and those highways were marked on maps for the first time. The first M-10 was designated along the highways from Ohio through Detroit to Standish. M-76 connected Standish with Grayling, where the first M-14 ran northward to Cheboygan. From there, M-10 connected to Mackinaw City. In the UP, M-12 connected St. Ignace with Sault Ste. Marie along a route to the east of the old Mackinac Trail. When the United States Numbered Highway System was formed on November 11, 1926, most of these highways were redesignated as part of